Stock-Based Employee Compensation Plans - Schedule of stock option activity under plans (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Number of Shares
Outstanding, beginning of period (in shares)			1,009,466	864,330
Granted (in shares)			0	250,000
Exercised (in shares)	0	(3,250)	(10,728)	(18,250)
Forfeited/Canceled (in shares)			(406,310)	(7,404)
Outstanding, end of period (in shares)	592,428	1,088,676	592,428	1,088,676
Option Exercisable, end of period (in shares)	358,821	720,402	358,821	720,402
Options Vested, end of period (in shares)	358,821	720,402	358,821	720,402
Weighted- Average Exercise Price Per Share
Weighted Average Exercise Price, beginning of period (in dollars per share)			$ 6.98	$ 6.86
Granted (in dollars per share)			0	7.33
Exercised (in dollars per share)			4.66	5.57
Forfeited/Canceled (in dollars per share)			6.98	8.15
Weighted Average Exercise Price, end of period (in dollars per share)	$ 7.01	$ 6.98	7.01	6.98
Options Exercisable, end of period (in dollars per share)	6.74	6.68	6.74	6.68
Options Vested, end of period (in dollars per share)	$ 6.74	$ 6.68	$ 6.74	$ 6.68